Marlo sits next to 4 phonetic neighbors — Marlowe, Harlow, and Caro are the closest matches by sound. Most share Marlo's English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"drained lake"
"dark beauty"
"horse joy"
"to pay homage"
"joy, happiness"
"heavenly mist"
"princess, queen"
"gift of God (via Dorothy)"
"burnt meadow clearing"
"other Aenor, foreign honor"
"native Hawaiian acacia tree"
"the calming sky"
"pledge, oath"
"strong, virtuous, honorable"
"bright day, daylight"
"from the king's wood"
"light, bright, shining"
"gods will, divine wonder"
"fair phantom, white wave"
"warrior maiden who escorts the dead"
Similar sound: These names share phonetic patterns with Marlo — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Old English origins, giving them the same cultural heritage as Marlo.
Rhythm: Marlo is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.